Question 681:

If two independent samples are used in a hypothesis test concerning the difference between population means for which the combined degrees of freedom is 20, which of the following could not be true about the sample sizes n1 and n2?
A) n1=12 and n2=8
B) n1=12 and n2=10
C) n1=13 and n2=9
D) Cannot be determined from the given information